"Gadget" is a catch-all word these days for nifty devices. We've covered the basics, such as clocks & watches, plus delved into the world of present-day and future high-tech gadgets, such as digital jewelry and restaurant pagers.
You believe your fitness tracker's data when it says you walked 10,000-plus steps and burned more than 500 calories today. But how accurate are those results? Could your FitBit be underestimating — or (gasp!) inflating — your daily energy output?